Monday
Monday has demonstrated remarkable resilience across human history. Attempts to eliminate Monday have included the French Revolutionary Calendar, which briefly succeeded before Napoleon restored traditional timekeeping. The Soviet experiment with five and six-day weeks similarly failed to permanently abolish the concept. Monday has survived every calendar reform proposed since antiquity.
Even proposals for four-day work weeks do not eliminate Monday; they merely shift its position or rename its function. The structural durability of Monday appears to be woven into the fabric of human temporal organisation. It cannot be destroyed because it is not a thing but a recurrence, an eternal return that transcends physical elimination.
Superman
The Kryptonian constitution provides Superman with extraordinary physical durability. His cellular structure, supercharged by yellow solar radiation, renders him effectively invulnerable to conventional weaponry. He has survived nuclear explosions, cosmic impacts, and dimensional displacement with minimal lasting damage.
However, documented vulnerabilities persist. Kryptonite exposure causes rapid cellular degradation. Magic bypasses his physical defences entirely. Red solar radiation drains his powers completely. Superman has, in fact, died, requiring elaborate resurrection through the regeneration matrix. His durability, whilst impressive, demonstrates clear conditional limitations.